http://95.179.246.60/mediawiki/index.php?action=history&feed=atom&title=Errors%2C_raise_and_catch_signals 2026-05-08T12:52:27Z Revision history for this page on the wiki MediaWiki 1.39.17 http://95.179.246.60/mediawiki/index.php?title=Errors,_raise_and_catch_signals&diff=116&oldid=prev 2025-05-04T21:28:49Z

<p>imported material</p> <p><b>New page</b></p><div>* This page collects a few snippets I find useful to pick up this topic<br /> * You make an error object like this:<br /> <br /> Error new messageText: &#039;fooerr&#039; <br /> <br /> * For the Error to generate an &#039;error signal&#039; you do<br /> <br /> Error new messageText: &#039;fooerr&#039; ; signal<br /> <br /> * You can define your own errors subclassing &lt;code&gt;Error&lt;/code&gt; and maybe adding a default &lt;code&gt;messageText&lt;/code&gt; and &lt;code&gt;tag&lt;/code&gt;.<br /> * Example of catching a risen Error signal<br /> <br /> [ Error new messageText: &#039;fooerr&#039; ; signal ] on: Error do: [ <br /> Transcript log: &#039;foobar&#039;. <br /> ].</div>

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